My Tea Party does not endorse people at all. We collect information about the candidates and make it readily available and obvious to our members. We call out the crooked candidates for what they are. But we never say "vote fo xxxxx.".
Certainly individual members can go help candidates any way they choose, but as a group; no way.
Some groups may do endorsements, but it is becoming frowned upon due to the corruptive nature of becoming political cheerleaders. It also creates dissention within the group and causes rifts. A perfect example is the US Senate race in Indiana.